They have the serial number from when it was purchased new from a FFL holder when a background check was done on the purchaser. They don’t know who is supposed to own that gun if it is then subsequently sold by the private owner to another person. After July 1st all gun sales/transactions of guns bought from a FFL holder will then require a background check any time that gun is sold/transfers ownership. To my understanding the serial number will be tracked along with the person who passed the background check and is supposed to now own the gun.
This, along with mandatory reporting of lost or stolen firearms seems to be registration to me. Seems like they will know the serial number and who is supposed to own that gun.
Freegards
Ok, so this is tracking of private sales?
Good luck with that.
And all the boating accidents soon to come.